Enjoy your music without the wires with Sony's CH500 headphones. They connect to your smart device via Bluetooth or NFC for a wonderful wireless listen. Take phone calls with the built in mic, or activate your iOS or Android smart phone's voice assistant with a single button. They're ideal for travel too with folding-flat swivel design. Simple Wireless Connection Enjoy the benefit of unrestricted listening and lose the cables with Near Field Communication (NFC). Using NFC the headphones are able to connect to your smart device with just one touch, or via simple Bluetooth, and with no wires in sight. Read more… Recharging via USB cable, the battery lasts up to 20 hours to keep you immersed in music all day. Sony Sound Enjoy Sony sound quality with 30mm dome drivers for dynamic, crisp and detailed audio. Convenient Calls & Voice Assistant Control Take phone calls with ease using the built-in high-quality microphone. Via buttons on the ear-piece, you can also control music playback and volume. And with the press of one button you can activate Google Assistant or Siri from compatible smart phones, so you can ask questions and receive answers directly through your headphones. Handy Folding Design The ear-cups swivel to a flattened position for easy storage and travel.